Electric bell



PATBNTED'MAY 1, 190s.

M. SETTER. ELECTRIC BELL. APPLloATIqN FILED ocT.a1. 1904.

i Mw n w l 1 Mmmm Mw. fm af 7 /W/ UNITED STATES PATENT OFFICE.

MICHAEL sErrER, OF CHICAGO, ILLINOIS, AssIeNoR To ,AIITOM'ATIC ELECTRIC COMPANY, or CHICAGO, ILLINOIS. l

ELECTRIC BELL Specification of Letters Patent.

Patented May 1, 190e.

Application iled October 3l, 1904. Serial No. 230,758.

To all whom zit may concern:-

Be it known that I, MICHAEL SETTER, av citizen of the United States of America, and a resident of Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Electric Bells, of which the Afollowing is a specification.

My invention relates to electric bells in generaL but more particularly to the socalled polarized ringers, employed, for eX- ample, at the subscribers station of a telephone system, and especially to bells of this character having means-for adjusting the armature relatively to the cores of the electromagnet.

Generally stated, the object of my invention is the provision of an improved and highly-efficient electric bell, and a special object is to provide an improved construction and arrangement for adjusting the armature relatively to the cores of the electromagnet and whereby said armature may be adjustably supported upon the bracket or cross-bar by which the two magnet-cores are rigidly connected together, and it is also an object, of course, to provide certain details and teatures of improvement tending to increase the general efliciency and service-ability of an electric bell of this particular character.

To the fmegoing and O ther`useful ends my invention consists in the matters hereinafter set forth and claimed.

In the accompanying drawings, Figure l is a front elevation oi an electric' bell embodying the principles of my invention, the gongs or resonating portions being shown removed for convenience oi' illustration and certain portions of the electromagnet and the bracket or cross-bar being shown broken away and in section. Fig. is a side elevation of the device shown in l, certain portions of the electromagnot being shown broken away. F ig. 3 is a top plan of the device shown in Fig. 1. Fig. 4 is an enlarged detail vertical section of the adjustable connection provided between the armature and the bottom bracket or cross-bar of the electromagnet.

As thus illustrated the bell or ringer comprises an electromagnet consisting of a pair ot' straight cores A, provided with coils a and connected at their lower ends by the supporting bracket or cross -bar B. The said cores can be secured to the bracket or cross-bar by means of screws b, inserted through the said bracket and into threaded sockets or openings in the ends of the said magnet-cores. By means of said bracket or cross-bar the bell or ringer as a whole can be secured to a suitable support. The permanent magnet C has its lower pole secured to the under side of the a. d braolf- L or crossbar by means of a screw c. As shown, the upper pole of said permanent magnet extends across the top of the device and is provided With a recess c. The vibratory armature D is positioned between the upper ole of the permanent magnet and the cores o the electromagnet. Preferably and as illustrated the said armature is carried by a yoke or amature-mounting E, provided with openings e, through which'the cores of the electromagnet extend and having a stem or lower portion e. This stem or upright portion of the said armature-mounting is adjustably secured to the upright standard or vertical portion b of the bracket B. Said armature is supported by cone-shaped bearings d d', i11- serted through ears e2 on the armaturemounting. It will be seen that the bearing d consists of a pointed screw adapted to be held in any desired condition of adjustment by means of a lock-nut cl2. Any suitable means can be employed for adjustablv connecting the armature-mounting with the bracket B. For example, and as a simple and efficient arrangement, the upright portion b of the said bracket is provided with guides b2, between which the portion e may slide up and down. The said portion e of the armature-mounting is provided with a slot e and with a threaded opening e3. A clamping-screw e" extends through the slot e and 'engages a threaded opening b3 in the upright portion of the said bracket. An adjusting-screw e5 engages the threaded opening e and is provided with a tapered end portion adapted to engage the lower beveled surface of a tapered opening Z7t in the bracket portion b. The striker F is secured to the central portion of the armature and extends upwardly through the notch or recess cl in the permanent magnet'.

l/Vith the foregoing construction the operation is as follows: The screw e4 is loosened sui'liciently to allow the armature D to be magnet. The screw e5. is then tightened or 'ssl screwed inwardly until the said armature acquires the proper or desired distance from the ends of the electromagnet-cores. Itwill be seen that this adjustment is of an accurate and delicate char'acter, inasmuch as the rotation of the screw e5 causes the tapered end portion to gradually ride up the incline provided by the' 'lower surface of the tapered opening b4. After the proper adjustment has been secured in this manner the screw e4 can then be tightened' for the purpose of clamp- ,ng`theportions b and e against further relative adjustment.

. One of the objects of the foregoing conr.

struction is to secure a bell or ringer of a simple, compact, and economical character ,and adapted to give eiiicient service. It Will also be seen that with the construction shown the three elements-to wit, the permanent magnet, the electromagnet, and the armature-are each mounted'upon or carried by .the main supporting-bracket B. In other words, the-permanent magnetl is secured direcntly to the said bracket and does not serve to support any'other part of the device. The

electromagnet is mounted directly upon the said bracket and does not support any other part of the device, although 1t does of course' serveV as a means for guiding the yoke E in its up and down movements, and the said armatureds carried by the said bracket B and not by the permanent magnet or the electro- Consequently the permanent magmagnet. .net can be removed without removing any other portion.` The construction is such that it facilitates the manufacture and proper adjustment of the different parts. It also facilitatesthe substitution and repair -of the different parts, and in addition it will be seen that all of the parts with the exception of the two magnets'can. be stamped out of sheet metal. i It will be understood, of course, that the an Slide upon the cores of .said electromag-- 'net,'vvherebyltlre said armature will remain connected with the bracket when either the4 permanent or the electromagnet is removed,

a fstniker secured to said armature .and eX- tending through the end portion of sa1d perlnrianent magnet, the said bracket and striker being disposed at opposite ends of'said electromagnet, the said `electromagnct comprisingjtwolcoils suiiiciently separated to afford access between them to the adjustable con-` nection between the bracket and armature,`

for purposes of adjustment of the latter, Athe entire adjusting means being located in a plane between the upper and lower ends of the electromagnet, and at a point close to the inner side of the permanent magnet, an adjusting-screw disposed at a right Iangle to the inner side-of the permanent magnet, and means whereby the endwise movement of said screw shifts the armature ina direction 'ture may remain mounted upnn the saidl bracket when the two magnets are removed, a striker secured to said armature and extending through the end portion of said permanent magnet, the said bracket and striker being disposed at opposite ends vof said electro` magnet, the said electromagnet comprising" two coils sufficiently separated to afford a'ccess between them to the adjustableconnection between'the bracket and armature, for purposes of adjustment of the latter, the entire adjusting means being located in a plane between the upper and lower ends ofthe electromagnet, and at a point close to the inner side o'f the permanent magnet, an adjustingscrew disposed at a right angle to the inner side of the vpermanent magnet, and means whereby the endwise movement of said screw shifts the armature in a direction at a right angle to such endwise movement.

3. An electric bell comprising a bracket, a permanent magnet having one polelsecured to the outside of said bracket, an electro- 'magnet secured to the inner surface of said.

bracket, an armature mounting rovided with an integral stem adjustably connected with an integral portion of said bracket, the said integral portion of the' bracket extending toward the armature, and a vibratory armature mounted upon said armature-'mounting, together with adjusting means comprising a screw applied to said integral portion and' disposed ata right angle thereto, the said electromagnet comprising two coils suf'- iciently separated to afford access between them to the adjustable connection between the bracket and armature, for purposes of adjustment of the latter, the entire adjusting means being located in a ,plane between the upper and lower ends of the electromagroo net, and at a point close to the inner side of the permanent magnet, and means whereby the endwise movement of said screw shifts the armature in a direction-at a 'right angle to such endwise movement. 4

4^.` An electric bell comprising a bracket provided with 'an integral central upturned vertical portion, an electromagnet secured to said bracket, a permanent magnet also secured to said bracket, an armature-mounting adapted to slide upon the cores of said electromagnet and provided with an integral stern portion adjustably connected with the said vertical portion ofthe bracket, and a vibratory armature 'mounted upon said armature-moun ting, together with adjusting means comprising a screw applied to said integral portion and disposed at a right angie thereto, the' said electromagnet comprising two coils sufficiently separated to afford access between them to the adjustable connection between the bracket and armature, for purposes of adjustment of the latter, the entire adjusting means being located in a plane between the upper and lower ends of the electromagnet, and at a point close tothe inner side of the permanent magnet, and means whereby the endwise movement of said screw shifts the armature in a direction at a right angle to such endwise movement.

5. An electric bell comprising a bracket, an electromagnet secured to said bracket, a permanent magnet secured to said bracket, said bracket having a bevel, an armaturemounting provided with a threaded opening, a screw inserted in said threaded opening and having its end engaging said bevel, and an armature carried by said armature-mounting, said armature being adjustable relatively to the electromagnet cores by adjusting said screw.

6. An electric'bell comprising a magnet, a support, a vibratory armature, and an adjustable connection between said armature and support, said.connection comprising a screw carried by one part and adapted to enage a beveled surface on another part, whereby the adjustment of said screw effects an adjustment ofthe armature relatively to said magnet.

7. An electric bell comprising a bracket rovided with an upturned vertical portion aving guides, an electromagnet secured to said bracket, a permanent magnet'also seportion of the bracket tight cured to said bracket, an armature-mounting provided with a stem adapted to slide up and down between said guides, the said upturned portion of the bracket being provided with a bevel, and the said stem having a screw adapted to engage said bevel, another screw for clampin@r the stem and u turned vertical ly together, and an armature carried by said armature-mounting.

8. An electric bell comprising a bracket, an electromagnet, a permanent magnet, a yoke positioned betweenthe electromagnet and the adjacent pole ofthe permanent magnet, said yoke being adapted to slide upon the cores of said electromagnet, and the adjacentpole of the permanent magnet having a recess or opening, an armature pivotally mounted upon said yoke, the armature being located between the yoke and the adjacent pole oi' the permanent magnet, a striker carried by the said armature and projecting through the said recess or opening in the permanent magnet, the said bracket and striker being disposed at o posite ends of said electromagnet, the sai electromagnet comprising two coils suiiiciently separated to afford access between them to the adjustable connection between the bracket and armature, for purposes of adjustment of the latter, the entire adjusting means being located in a plane between the upper and lower ends of the electroma net, and at a point close to the inner side o the permanent magnet, an adjusting-screw disposed at a right angle to the inner side ofthe permanent magnet, and means whereby the endwise movement of said screw shifts the armature in a direction at a right angle to such endwise movement.

Signed' by me at Chicago, Cook county, Illinois, this 25th day of October, 1904.

MICHAEL SETTER.

Witnesses:

A. E. KEITH, R. C. Grrronn. 

